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A024302
Expansion of sin(sinh(x))*x/2.
0
0, 1, 0, -24, -224, 320, 76032, 2165632, 23343104, -1474043904, -127160524800, -5452094095360, -48051108446208, 17669269569961984, 2144050100688125952, 144303119119098839040, 2287457902532063395840
OFFSET
0,4
MATHEMATICA
With[{nn=40}, Take[CoefficientList[Series[Sin[Sinh[x]] x/2, {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Sep 06 2019 *)
CROSSREFS
Cf. A009493.
Sequence in context: A202073 A107968 A269777 * A181710 A201192 A345648
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs Mar 1997
Previous Mathematica program replaced by Harvey P. Dale, Sep 06 2019
STATUS
approved